1 = For example, the number of elements in the set of subsets of the empty set: { {} }

2 = Examples: The number of elements in the set of subsets of a one-element set. Or, the number of elements in this set: { {}, { {} } } = the set which contains the empty set along with the set containing the empty set.

There are infinite infinite cardinal numbers since a greater infinity can always be generated by taking the cardinal number of the set of subsets (or power set) of a set with a lesser infinity of elements.